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  <div class="section" id="target-compile-options">
<span id="command:target_compile_options"></span><h1>target_compile_options<a class="headerlink" href="#target-compile-options" title="Permalink to this headline">¶</a></h1>
<p>Add compile options to a target.</p>
<div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">target_compile_options(</span><span class="nv">&lt;target&gt;</span><span class="w"> </span><span class="p">[</span><span class="no">BEFORE</span><span class="p">]</span><span class="w"></span>
<span class="w">  </span><span class="o">&lt;</span><span class="no">INTERFACE</span><span class="p">|</span><span class="no">PUBLIC</span><span class="p">|</span><span class="no">PRIVATE</span><span class="o">&gt;</span><span class="w"> </span><span class="p">[</span><span class="nb">items1...</span><span class="p">]</span><span class="w"></span>
<span class="w">  </span><span class="p">[</span><span class="o">&lt;</span><span class="no">INTERFACE</span><span class="p">|</span><span class="no">PUBLIC</span><span class="p">|</span><span class="no">PRIVATE</span><span class="o">&gt;</span><span class="w"> </span><span class="p">[</span><span class="nb">items2...</span><span class="p">]</span><span class="w"> </span><span class="p">...]</span><span class="nf">)</span><span class="w"></span>
</pre></div>
</div>
<p>Adds options to the <span class="target" id="index-0-prop_tgt:COMPILE_OPTIONS"></span><a class="reference internal" href="../prop_tgt/COMPILE_OPTIONS.html#prop_tgt:COMPILE_OPTIONS" title="COMPILE_OPTIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">COMPILE_OPTIONS</span></code></a> or
<span class="target" id="index-0-prop_tgt:INTERFACE_COMPILE_OPTIONS"></span><a class="reference internal" href="../prop_tgt/INTERFACE_COMPILE_OPTIONS.html#prop_tgt:INTERFACE_COMPILE_OPTIONS" title="INTERFACE_COMPILE_OPTIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">INTERFACE_COMPILE_OPTIONS</span></code></a> target properties. These options
are used when compiling the given <code class="docutils literal notranslate"><span class="pre">&lt;target&gt;</span></code>, which must have been
created by a command such as <span class="target" id="index-0-command:add_executable"></span><a class="reference internal" href="add_executable.html#command:add_executable" title="add_executable"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">add_executable()</span></code></a> or
<span class="target" id="index-0-command:add_library"></span><a class="reference internal" href="add_library.html#command:add_library" title="add_library"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">add_library()</span></code></a> and must not be an <a class="reference internal" href="../manual/cmake-buildsystem.7.html#alias-targets"><span class="std std-ref">ALIAS target</span></a>.</p>
<div class="section" id="arguments">
<h2>Arguments<a class="headerlink" href="#arguments" title="Permalink to this headline">¶</a></h2>
<p>If <code class="docutils literal notranslate"><span class="pre">BEFORE</span></code> is specified, the content will be prepended to the property
instead of being appended.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">INTERFACE</span></code>, <code class="docutils literal notranslate"><span class="pre">PUBLIC</span></code> and <code class="docutils literal notranslate"><span class="pre">PRIVATE</span></code> keywords are required to
specify the scope of the following arguments.  <code class="docutils literal notranslate"><span class="pre">PRIVATE</span></code> and <code class="docutils literal notranslate"><span class="pre">PUBLIC</span></code>
items will populate the <span class="target" id="index-1-prop_tgt:COMPILE_OPTIONS"></span><a class="reference internal" href="../prop_tgt/COMPILE_OPTIONS.html#prop_tgt:COMPILE_OPTIONS" title="COMPILE_OPTIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">COMPILE_OPTIONS</span></code></a> property of
<code class="docutils literal notranslate"><span class="pre">&lt;target&gt;</span></code>.  <code class="docutils literal notranslate"><span class="pre">PUBLIC</span></code> and <code class="docutils literal notranslate"><span class="pre">INTERFACE</span></code> items will populate the
<span class="target" id="index-1-prop_tgt:INTERFACE_COMPILE_OPTIONS"></span><a class="reference internal" href="../prop_tgt/INTERFACE_COMPILE_OPTIONS.html#prop_tgt:INTERFACE_COMPILE_OPTIONS" title="INTERFACE_COMPILE_OPTIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">INTERFACE_COMPILE_OPTIONS</span></code></a> property of <code class="docutils literal notranslate"><span class="pre">&lt;target&gt;</span></code>.
(<a class="reference internal" href="../manual/cmake-buildsystem.7.html#imported-targets"><span class="std std-ref">IMPORTED targets</span></a> only support <code class="docutils literal notranslate"><span class="pre">INTERFACE</span></code> items.)
The following arguments specify compile options.  Repeated calls for the same
<code class="docutils literal notranslate"><span class="pre">&lt;target&gt;</span></code> append items in the order called.</p>
<p>Arguments to <code class="docutils literal notranslate"><span class="pre">target_compile_options</span></code> may use “generator expressions”
with the syntax <code class="docutils literal notranslate"><span class="pre">$&lt;...&gt;</span></code>. See the <span class="target" id="index-0-manual:cmake-generator-expressions(7)"></span><a class="reference internal" href="../manual/cmake-generator-expressions.7.html#manual:cmake-generator-expressions(7)" title="cmake-generator-expressions(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">cmake-generator-expressions(7)</span></code></a>
manual for available expressions.  See the <span class="target" id="index-0-manual:cmake-buildsystem(7)"></span><a class="reference internal" href="../manual/cmake-buildsystem.7.html#manual:cmake-buildsystem(7)" title="cmake-buildsystem(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">cmake-buildsystem(7)</span></code></a>
manual for more on defining buildsystem properties.</p>
<p>The final set of compile or link options used for a target is constructed by
accumulating options from the current target and the usage requirements of
its dependencies.  The set of options is de-duplicated to avoid repetition.
While beneficial for individual options, the de-duplication step can break
up option groups.  For example, <code class="docutils literal notranslate"><span class="pre">-D</span> <span class="pre">A</span> <span class="pre">-D</span> <span class="pre">B</span></code> becomes <code class="docutils literal notranslate"><span class="pre">-D</span> <span class="pre">A</span> <span class="pre">B</span></code>.  One may
specify a group of options using shell-like quoting along with a <code class="docutils literal notranslate"><span class="pre">SHELL:</span></code>
prefix.  The <code class="docutils literal notranslate"><span class="pre">SHELL:</span></code> prefix is dropped, and the rest of the option string
is parsed using the <span class="target" id="index-0-command:separate_arguments"></span><a class="reference internal" href="separate_arguments.html#command:separate_arguments" title="separate_arguments"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">separate_arguments()</span></code></a> <code class="docutils literal notranslate"><span class="pre">UNIX_COMMAND</span></code> mode.
For example, <code class="docutils literal notranslate"><span class="pre">&quot;SHELL:-D</span> <span class="pre">A&quot;</span> <span class="pre">&quot;SHELL:-D</span> <span class="pre">B&quot;</span></code> becomes <code class="docutils literal notranslate"><span class="pre">-D</span> <span class="pre">A</span> <span class="pre">-D</span> <span class="pre">B</span></code>.</p>
</div>
<div class="section" id="see-also">
<h2>See Also<a class="headerlink" href="#see-also" title="Permalink to this headline">¶</a></h2>
<p>This command can be used to add any options. However, for adding
preprocessor definitions and include directories it is recommended
to use the more specific commands <span class="target" id="index-0-command:target_compile_definitions"></span><a class="reference internal" href="target_compile_definitions.html#command:target_compile_definitions" title="target_compile_definitions"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_compile_definitions()</span></code></a>
and <span class="target" id="index-0-command:target_include_directories"></span><a class="reference internal" href="target_include_directories.html#command:target_include_directories" title="target_include_directories"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_include_directories()</span></code></a>.</p>
<p>For directory-wide settings, there is the command <span class="target" id="index-0-command:add_compile_options"></span><a class="reference internal" href="add_compile_options.html#command:add_compile_options" title="add_compile_options"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">add_compile_options()</span></code></a>.</p>
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<li><a class="reference internal" href="#">target_compile_options</a><ul>
<li><a class="reference internal" href="#arguments">Arguments</a></li>
<li><a class="reference internal" href="#see-also">See Also</a></li>
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